diff --git a/CHANGELOG.md b/CHANGELOG.md
index b21aea7..226ca43 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Others
+
+* some updates
+
 ## [1.6.1] - 2020-01-19
 
 ### Fixed
diff --git a/README.md b/README.md
index ff00f0f..01623f7 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Useful for SCP, SFTP, and `rsync` over SSH in deployment script.
 
 Add your SSH key to your product secrets by clicking `Settings` - `Secrets` - `Add a new secret` beforehand.
 
-**NOTE:** Due to version of OpenSSH on VM, OPENSSH format (key begins with `-----BEGIN OPENSSH PRIVATE KEY-----`) may not work. Please use PEM format (begins with `-----BEGIN RSA PRIVATE KEY-----`) instead.
+**NOTE:** OPENSSH format (key begins with `-----BEGIN OPENSSH PRIVATE KEY-----`) may not work due to OpenSSH version on VM. Please use PEM format (begins with `-----BEGIN RSA PRIVATE KEY-----`) instead.
 
 ```yaml
 runs-on: ubuntu-latest
@@ -42,7 +42,7 @@ See [Workflow syntax for GitHub Actions](https://help.github.com/en/articles/wor
 If you want to install multiple keys, call this action multiple times.
 It is useful for port forwarding.
 
-**NOTE:**  When this action is called multiple times, **the contents of `known-hosts` and `config` will be appended**. But `private-key` must be saved as different name, by using `name` option.
+**NOTE:**  When this action is called multiple times, **the contents of `known-hosts` and `config` will be appended**. `private-key` must be saved as different name, by using `name` option.
 
 ```yaml
 runs-on: ubuntu-latest